Convert Image Formats Online — HEIC, JPEG, PNG & WebP

Convert HEIC, JPEG, PNG, and WebP formats instantly with total privacy. After converting, compress for smaller file sizes.
100% private - your images never leave your device. Free, fast, and secure client-side processing.

Click to upload or drag and drop

PNG, JPG, WEBP, HEIC up to 100MB

Desktop: Drag from anywhere •Mobile: Tap to browse

How to Convert Images

1Upload Image

Select an image in any supported format (JPEG, PNG, WebP, HEIC). The format is automatically detected.

2Choose Format

Select your target format from the dropdown. Adjust quality for JPEG/WebP to control file size vs. visual quality.

3Convert & Download

Click convert to process the image. Preview the result and download in your chosen format instantly.

Key Features

Multiple Formats

Convert between JPEG, PNG, and WebP. HEIC images can be converted to any format for better compatibility.

Quality Control

For lossy formats (JPEG, WebP), adjust quality settings to find the perfect balance between file size and image quality.

Complete Privacy

All conversion happens in your browser using Canvas API and heic2any. Your images never leave your device.

Size Comparison

See exact file size changes instantly. Compare original and converted sizes to make informed decisions.

Image Format Guide: When to Use What

Choosing the right image format can be confusing. Here is a breakdown of the most common formats and when you should convert to them.

Format	Best For	Pros	Cons
JPEG	Photos, Web Images	Small size, Universal compatibility	No transparency, Lossy
PNG	Logos, Screenshots	Transparency, Lossless quality	Larger file size
WebP	Modern Websites	Superior compression, Transparency	Older browser support (rare now)
HEIC	iPhone Photos	High quality, Small size	Poor compatibility on Windows/Web

Why Convert HEIC to JPEG?

HEIC (High Efficiency Image Container) is the default format for photos on modern iPhones. While it offers great quality at small sizes, it's often incompatible with:

Windows computers (without plugins)
Many websites and CMS platforms
Online forms and applications
Older Android devices

SnapCompress allows you to instantly convert your HEIC photos to JPEG or PNG directly in your browser, making them universally compatible for sharing and uploading.

Image Format Comparison

Format	Best For	Compression	Transparency	Browser Support
JPEG	Photos & Images	High (Lossy)	No	Universal
PNG	Graphics & Logos	Low (Lossless)	Yes	Universal
WebP	Web & Modern Apps	Very High	Yes	Modern Browsers
HEIC	iPhone Photos	Very High	Yes	Limited (iOS/Mac)

💡 Quick tip: Use JPEG for photos, PNG for graphics with transparency, WebP for modern web apps, and convert HEIC (iPhone) to JPEG for universal compatibility.

About Image Formats

JPEG

Best for photos. Lossy compression with adjustable quality.

Universal support, smaller files, no transparency

PNG

Best for graphics and transparency. Lossless compression.

Supports transparency, larger files, perfect quality

WebP

Modern format with excellent compression for web use.

Best compression, transparency support, modern browsers only

Note: HEIC can only be used as input format. Browsers cannot encode to HEIC, only decode from it.

Common Use Cases

HEIC to JPEG: Convert iPhone photos to widely-compatible JPEG format for sharing
PNG to WebP: Reduce file size for web images while maintaining quality and transparency
JPEG to PNG: Convert photos to PNG for editing software that requires lossless format
Any to WebP: Optimize images for modern websites with the best compression-to-quality ratio

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Image Format Conversion FAQ

Common questions about converting between image formats online.

How do I convert HEIC to JPEG online?

Upload your HEIC file (iPhone photo), select JPEG as the output format, adjust quality if needed (85% recommended), and click convert. Your HEIC file will be converted to JPEG instantly in your browser without any uploads.

What image formats can I convert between?

SnapCompress supports conversion between JPEG, PNG, WebP, and HEIC formats. You can convert from any format to JPEG, PNG, or WebP. HEIC is supported as input only (perfect for iPhone photos that need to be shared).

Does converting images reduce quality?

Converting from lossless to lossy formats (like PNG to JPEG) may reduce quality slightly. However, you can control this with the quality slider. Converting between lossy formats maintains quality at the chosen setting. PNG conversions are lossless.

Can I convert images without losing transparency?

Yes! PNG and WebP formats support transparency. When converting images with transparent backgrounds, choose PNG or WebP as your output format. Converting to JPEG will replace transparency with a white background.

Why should I convert to WebP format?

WebP offers superior compression compared to JPEG and PNG, resulting in smaller file sizes with excellent quality. It's perfect for websites and modern applications, with widespread browser support.

Is there a file size limit for conversion?

No file size limits! All conversion happens in your browser using client-side processing, so you can convert images of any size without server restrictions.

How fast is image format conversion?

Conversion is nearly instant, typically taking 1-2 seconds depending on image size and your device. Since everything happens locally in your browser, there's no upload or download time.

Can I convert multiple images at once?

Currently, SnapCompress converts one image at a time. You can quickly process multiple images by converting them sequentially. Batch conversion is planned for a future update.

What quality setting should I use for JPEG conversion?

For most purposes, 80-85% quality is recommended for JPEG conversion. This provides excellent visual quality with good file size reduction. Use 90%+ for photos that require high fidelity.

Will converting affect image dimensions?

No, format conversion preserves the original image dimensions (width and height). The file size and format change, but pixel dimensions remain identical unless you also use the resize tool.